Pith Number

pith:23DO3QAL

pith:2008:23DO3QALQRGFDDF4ZGCBZTSVPX

not attested not anchored not stored refs pending

Feedback Control and the Arrow of Time

Malcolm C. Smith, Tryphon T. Georgiou

arxiv:0804.3117 v1 · 2008-04-19 · math.DS · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{23DO3QALQRGFDDF4ZGCBZTSVPX}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:26:39.775088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6c6edc00b844c518cbcc9841cce557df6f44c6604d482f446a939ddc9c799e8

Aliases

arxiv: 0804.3117 · arxiv_version: 0804.3117v1 · doi: 10.48550/arxiv.0804.3117 · pith_short_12: 23DO3QALQRGF · pith_short_16: 23DO3QALQRGFDDF4 · pith_short_8: 23DO3QAL

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/23DO3QALQRGFDDF4ZGCBZTSVPX \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d6c6edc00b844c518cbcc9841cce557df6f44c6604d482f446a939ddc9c799e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78fe9685f2d64f682cfd952bf012ae281cb997e1d030030717dd97e982ce0f5b",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2008-04-19T00:37:27Z",
    "title_canon_sha256": "902c180aadf1fcb5e36402d165e8633aafcdffb0ada05a27f4c7a73e35cb077b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3117",
    "kind": "arxiv",
    "version": 1
  }
}